Unlike the standard 157S which resets automatically when the water level is restored

Common Questions How do I know if the D-3073-600 needs replacement

allowing for precise site-specific tuning

System Reliability: Minimizes intermittent pilot errors and flame failures

the sealed (booted) switch design provides the necessary protection against moisture and dust ingress required for outdoor or washdown environments

Resideo AT72D1691 Transformer R-22 Unlike the standard 157S whichThe Resideo AT72D1691 Transformer is a heavy duty 40VA power solution engineered for consistent performance in demanding HVACR applications. Designed for versatile installation, this plate mounted 24V transformer features a multi tap primary, allowing for easy integration with 208V 240V power supplies. It provides a stable 26. 5 V. O. C. secondary output, making it ideal for powering complex control circuits, including thermostats, gas valves, and